Create facts.matching method

Author: kpaulisse

lib/octocatalog-diff/facts.rb

@@ -120,5 +120,12 @@ def override(key, value)
         @facts['values'][key] = value
       end
     end
+
+    # Find all facts matching a particular pattern
+    # @param regex [Regexp] Regular expression to match
+    # @return [Array<String>] Facts that match the regexp
+    def matching(regex)
+      @facts['values'].keys.select { |fact| regex.match(fact) }
+    end
   end
 end

spec/octocatalog-diff/tests/facts_spec.rb

@@ -133,5 +133,11 @@
         expect(result_arr[3].strip).to eq('apt_update_last_success: 1458162123')
       end
     end
+
+    describe '#matching' do
+      it 'should return facts that match the regexp' do
+        expect(@obj.matching(/(last|stamp)/)).to eq(%w[apt_update_last_success timestamp])
+      end
+    end
   end
 end